API & AI
Updated 2026-11-11 22:31 UTC
REST API
Read-only JSON endpoints under /api/v1 with a personal token. A free account's token: 1,000 requests a UTC day for the board, pair and rate endpoints at the free sizes ($2,000, $5,000 or $10,000 per side, 7 days; the transfer API stays Pro). A Pro token: your own size and holding period, the line-by-line breakdown and 120 requests a minute. Full schema at /api/openapi.json.
What this call returns right now
| Coin | Pair | Long | Short | Net · 168 h | Net APR | Max size | Status |
|---|---|---|---|---|---|---|---|
| INIT | Perp ↔ perp | MEXC INIT_USDT | Gate INIT_USDT | +$1,206 | +628.7% | $10.2K | Actionable |
| INIT | Perp ↔ perp | BloFin INIT-USDT | Gate INIT_USDT | +$1,193 | +622.1% | $10.2K | Actionable |
| INIT | Perp ↔ perp | MEXC INIT_USDT | Bitget INITUSDT | +$784.12 | +408.9% | $11.4K | Actionable |
| INIT | Perp ↔ perp | BloFin INIT-USDT | Bitget INITUSDT | +$767.88 | +400.4% | $15.8K | Actionable |
| IDOL | Perp ↔ perp | LBank IDOLUSDT | Aster IDOLUSDT | +$589.03 | +307.1% | $12K | Watch |
GET /api/v1/markets/opportunities?notional=10000&holding=168&tier=board&limit=5
MCP server for AI assistants
28 read-only tools at /mcp (streamable HTTP) with the same numbers as the site. No tool can trade.
No token needed to try it: without one the server answers on the anonymous tier, with exactly what an anonymous visitor of the site sees ($10,000 per side held 7 days), 60 requests per minute per IP address. A Pro token adds your own size, every tool and 60 calls per minute. These need a Pro token: pair_breakdown, dex_scan, my_positions.
MCP server for AI assistants
| Tool | |
|---|---|
| best_opportunities | Best funding-rate arbitrage opportunities |
| coin_overview | One coin across exchanges |
| pair_breakdown | Every number of one pair (Pro token) |
| funding_rates | Funding rates |
| borrow_rates | Margin borrow rates |
| fixed_vs_floating | Fixed vs floating funding (Pendle Boros) |
| execution_cost | Execution cost to enter a position |
| basis_trades | Basis trades against delivery futures |
| transfer_routes | Cross-exchange transfer (spot) arbitrage routes |
| pair_history | Settled-rate replay of one pair (7 to 365 days) |
| term_structure | Futures term structure of one coin |
| venue_execution_cost | Execution cost on one exchange |
| service_status | Service status |
| order_checklist | Order checklist for one pair |
| holding_scenarios | One pair over different holding periods |
| manual_calculator | Funding arbitrage calculator (typed-in legs) |
| boros_lock_calculator | Boros fixed-rate lock calculator |
| transfer_calculator | Cross-exchange transfer calculator |
| boros_market | One Pendle Boros market |
| boros_futures_basis | Boros implied rate vs futures basis |
| exchanges | Exchanges covered |
| exchange_overview | One exchange |
| coins | Coins covered |
| track_record | Public track record |
| dex_scan | CEX ↔ DEX arbitrage scan (Pro token) |
| spread_chart | Price spread of two legs |
| my_positions | My hedged positions (read-only keys) (Pro token) |
| spread_convergence | Price-spread convergence trades |
The method behind every number on AfterFees is published; Pro opens each figure into its line-by-line calculation. Estimates from current data, not investment advice. We never hold funds or trade for you.